Definition of "rule out" []

• To cross an item out by drawing a straight line through it, as with a ruler. (verb)
• To reject an option from a list of possibilities. (verb)
• To make something impossible. (verb)
• To disallow (verb)

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• "Openness to discovery as well as appreciation of what is being shown may create an optimal state for the emergence of certain genuine phenomena, while multiple observers rule out self-deception."
• "Not only does this paradigm rule out the medium reading the mind of the sitter or experimenter, but it also implies that the medium is not simply reading dead information in space, since the accuracy of the information requires the intentional cooperation of a spirit co-investigator."
• "Several times Dr. Frazier has used MRI to rule out bipolar disorder in cases in which a child presented with atypical bipolar symptoms but an MRI revealed tiny brain lesions, actually caused by Lyme disease."